Herb grinder



FIG. 1 is a top perspective view of the herb grinder showing my new design;

FIG. 2 is a top plan view of the herb grinder, the bottom view being a mirror-image thereof;

FIG. 3 is a front view of the herb grinder, the rear view being a mirror-image thereof; and,

FIG. 4 is a right side view of the herb grinder, the left side view being a mirror-image thereof. 

The ornamental design for an herb grinder, as shown and described. 